I ordered one and it took something like 3 to 4 months. I ordered it with the 5 round mag, and it cleared without issues.
I think I should have waited for reviews, because this thing is finicky as hell. But TBH, the original remington BDL follower was so terrible, it was a huge improvement. It needs significant work to get it to fit using any real AR magazines. The mags that PTG make for this system are nearly proprietary with very tight tolerances and high quality materials. So if you solely use PTG mags for it, very little work will need to be done. PMags will probably never work in mine. Removing the right amount of material on the receiver is a job left to a good smith. You might be able to get away with bending the lips a smidge on junk quality metal AR mags or LAR 15 mags to get them to feed.
I think PTG could try to offer a whole new bolt with this or some blueprints to send to a smith to modify the existing bolt to better strip rounds out.